forked from LeenkxTeam/Kmake
33 lines
718 B
JavaScript
33 lines
718 B
JavaScript
// Copyright 2024 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax --turbolev --turbofan
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// Flags: --no-always-turbofan
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var u = new Uint32Array(2);
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u[0] = 1;
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u[1] = 0xEE6B2800;
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// Creating an object with a Smi field `x`.
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let o = { x : 42 };
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function foo(i) {
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// Storing a Uint32 to a Smi field.
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o.x = u[i];
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};
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%PrepareFunctionForOptimization(foo);
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foo(0);
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assertEquals(u[0], o.x);
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%OptimizeFunctionOnNextCall(foo);
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foo(0);
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assertEquals(u[0], o.x);
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assertOptimized(foo);
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// Triggering deopt by trying to store non-smi
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foo(1);
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assertEquals(u[1], o.x);
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assertUnoptimized(foo);
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